The difference is that we say:
1 - ich (eech) without the 'i' at the end
6 - rok (long 'o') without the 'u' at the end
7 - hard to understand them, but it sounds like chee most the time without shi at the beginning
8 - hach (hah tch) without the 'i'

Exactly how we say it.

Golly, just imagine if English had these kind of inconsistencies. Whew!